/**
 * MINAPL Compiler.
 * Copyright 2012 Michael A. Muller
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#ifndef _minapl_Buffer_h_
#define _minapl_Buffer_h_

namespace minapl {

/** An ever-growing buffer. */
struct Buffer {
    char *allocPoint, *start, *cur, *end;

    ~Buffer();

    /** Start a new token. */
    void startToken();

    /** Add a character to the buffer, growing if necessary. */
    void addChar(int ch);

    /**
     * Consume from the start of the token to the current position, reserving
     * it against future use.
     */
    void consume() {
        start = cur;
    }
};

} // namespace minapl

#endif
